Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S
The AirTAC SAIJ125X50-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6133N push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and a built-in magnet for CMSE reed and DMSE electronic sensors. The integrated rear stopper allows you to fine-tune the end position at commissioning, creating a usable travel window of 40-50mm without adding external stops.
This model uses a PT tapered port thread and operates at speeds of 30-500 mm/s. It shares the standard extruded aluminum barrel and sensor grooves on both sides, while omitting the FB, CA, CB, and CR mounting options found in some standard lines. The rear adjuster acts purely as a travel stop to decelerate the load, not as a lock, so live air is required to hold position.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S Is Used
Product Changeover Tuning
Quickly adjust the retract end-position by up to 10mm during packaging line format changes, ensuring precise mechanical stops for varying carton sizes without replacing the cylinder.
High-Force Pressing
Leverage the 6136N push force for heavy pressing or clamping tasks, using the rear adjuster to set the exact 40-50mm travel window and prevent over-travel during machine setup.
Machine Commissioning
Dial in the exact end-stop during initial commissioning to compensate for mechanical tolerances, using the stainless steel rod and DMSE solid-state sensors for reliable position feedback.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S the Right Cylinder?
Choose this 125mm bore cylinder when an application requires high thrust (6136N at 0.5 MPa) and precise end-position tuning within a 40-50mm window. If your process needs less force, stepping down to a 100mm bore yields 3927N of push force, whereas moving up to a 160mm bore provides 10053N. The adjustable stroke is ideal for product changeovers, allowing you to dial in the exact stroke length on the machine floor instead of swapping out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 125mm bore, 50mm nominal stroke, 10mm adjustment range, PT port thread, and the -S magnet option. Because the nominal stroke is only 50mm, side-load risks are minimal, but the rod thread (M27x2) and 32mm rod diameter still handle substantial loads. For applications that require true load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as this rear stopper does not lock the load.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10S FAQ
The rear adjuster screw acts as an external mechanical stop, allowing you to shorten the effective stroke by up to 10mm. This creates a usable travel window of 40-50mm, letting you fine-tune the end position without swapping the cylinder or adding external stops.
At 0.5 MPa operating pressure, the SAIJ125X50-10-S provides 6136N of push force and 5734N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 1251 kgf of push force.
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